Blind and methods for operating thereof

ABSTRACT

A blind which includes: a rectangular frame; windows fit double on the front and rear surfaces of the frame; a slat part embedded in the double windows mounted on the front and rear surfaces of the frame; an upper movable part and drum parts mounted on a back headrail half and a front headrail half of the upper portion of the frame to control the slat part; a side movable part inserted into a side guiderail of a side of the frame; and pull cords connected to the slat part having a bottomrail, the drum parts, and the side movable part having the large corner keys for controlling opening and closing of the blind.

FIELD

[0001] The present invention relates to a blind, and more particularly, to an inter blind seated in double windows and methods for operating thereof.

BACKGROUND

[0002] In general, a blind is to exclude sunlight or to prevent someone from looking in at a window, and has been installed onto a veranda or a window wall, on which the window is installed, to adjust surroundings and the interior atmosphere properly.

[0003] Double windows K have been used in multistoried buildings or buildings located on a noisy street. When the blind is installed on the double windows, it is installed between the double windows K for fine appearance with regard to the thickness of the double windows K or for preventing the blind from being covered with dust. However, there is a problem that a user has to operate the blind, which is installed in the sealed inside of the building from the outside to open and close the blind. So, there have been lots of studies to solve the above problem.

[0004] Korean Utility Model Publication No. 20-242601 discloses a shield device mounted between double windows K for excluding sunlight. Also, Korean Utility Model Publication No. 1993-0003878 discloses a partition, in which a blind is embedded, and Korean Utility Model Publication No. 20-0211757 discloses a device for controlling irradiant of sunlight and varying an advertising film through the double windows K.

[0005] However, the prior arts have several problems. It is complicated to open and close the blind installed inside the sealed double windows K and that the blind must be generally leveled at a predetermined angle, but is leaned to one side.

SUMMARY

[0006] Accordingly, the present invention is directed to a blind that substantially obviates one or more problems due to limitations and disadvantages of the related art.

[0007] The present invention provides a blind, which includes a frame for forming double windows, frame corner keys, an upper movable part and drum parts mounted on the upper portion of the inside of the frame, a side movable part embedded in a side of the frame, and a slat part mounted in the blind.

[0008] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0009] The blind includes: a rectangular frame; windows fit double on the front and rear surfaces of the frame; a slat part embedded in the double windows mounted on the front and rear surfaces of the frame; an upper movable part and drum parts mounted on a back headrail half and a front headrail half of the upper portion of the frame to control the slat part; a side movable part inserted into a side guiderail of a side of the frame; and pull cords connected to the slat part having a bottomrail, the drum parts, and the side movable part having the large corner keys for controlling opening and closing of the blind.

[0010] The back headrail half and the front headrail half, which are located on the lower portion of a guiderail holder, are curved, and so, easily fit to each other. A side guiderail engages the lower end of the guiderail holder firmly. A webbing roller, which has a narrower part at the center, allows a ladder string to be easily inserted through a webbing roller support center hole. Furthermore, the webbing roller has a bolt hole, which is formed in the upper portion of the webbing roller for fixing a shaft, formed in a position different from the bolt hole of the conventional blind, and so allows a bolt to be directly fastened without rotating the webbing roller.

[0011] A webbing roller ladder string fixing end 63 has a sharp arrow part of suitable length so as to easily make a hole in the ladder string. A webbing roller ladder string fixing body, which has the same thickness as the hole of the ladder string, prevents the ladder string from moving easily, and a webbing roller flat top 65, which is formed to the widest degree, allows the ladder string to be inserted easily. A webbing roller ladder string fixing body supporter has a protrusion for serving to prevent an arrowhead part of the webbing roller ladder string fixing end from being drooped and to prevent separation of the ladder string. A webbing roller support center hole 71, which has the width equal to the diameter of a webbing roller center hole, improves a slat closing effect. A webbing roller support side cut allows the pull cords to be inserted easily.

[0012] A helical gear through hole of a helical gear is formed in a position corresponding to a flat portion of the shaft, and so a user can tighten a bolt without rotating the helical gear. A helical gear fixture formed on the shaft prevents slip of the helical gear.

[0013] An inner tilting mechanism has a magnet inserting hole for attaching a magnet, and so the magnet is firmly fit to the magnet inserting hole without separation or slip.

[0014] A pulley set is mounted in a large corner key hole of the large corner key to prevent bending of the pull cord and to reduce friction coefficient.

[0015] A roller is mounted on a side of a magnet inserting hole of an up-down hand, so that the up-down hand can be moved up and down smoothly because rolling of the roller reduces friction coefficient largely even though magnetic force is strong.

[0016] The ladder string of the conventional blind is 15 mm-16 mm in width and 12 mm in height for the slat part, but the ladder string of the present invention is 13 mm in height to have equally folded shape and has a hole at the center between knots of the ladder string.

[0017] The hole of the ladder string is fit on a webbing roller ladder string fixing protrusion and the webbing roller ladder string fixing body, and the ladder string is supported horizontally by a webbing roller ladder string fixing body supporter, so that the ladder string can maintain at a level.

[0018] Inner pull cord holders have pulleys respectively to improve a pull cord tying method and to reduce friction coefficient.

[0019] An inner pull cord holder pulley, a cord fixing part of the inner pull cord holder, an inner pull cord holder side supporter hole, a magnet inserting hole, a roller, and first to third distance shortening devices are mounted, so that the vertical movement distance of the blind when the up-down hand is moved vertically can be reduced to ⅕, ⅓ or ½.

[0020] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

[0022]FIG. 1 is a detailed view of a blind according to an embodiment of the present invention;

[0023]FIG. 2 is a detailed view of an assembled frame part of the blind according to the present invention;

[0024]FIG. 3 is an exploded view of an upper movable part and a drum part of the blind;

[0025]FIG. 4 is a detailed exploded view of a side movable part of the blind;

[0026]FIG. 5 is a detailed view showing assembling and disassembling processes of corner keys of the blind;

[0027]FIG. 6 is a view showing a connected state of a pull cord of the drum part of the blind;

[0028]FIG. 7 is a view showing a connected state of the pull cord of the corner key of the blind;

[0029]FIG. 8 is a view showing a state that the blind is moved twice;

[0030]FIG. 9 is a view showing a state that the blind is moved three times;

[0031]FIG. 10 is a view showing a state that the blind is moved five times; and

[0032]FIG. 11 is a view of another example of a space bar and a side guiderail according to the present invention.

DETAILED DESCRIPTION

[0033] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0034]FIG. 1 is a detailed view of a blind according to an embodiment of the present invention. FIG. 2 is a detailed view of an assembled frame part of the blind according to the present invention. FIG. 3 is an exploded view of an upper movable part and a drum part of the blind. FIG. 4 is a detailed exploded view of a side movable part of the blind. FIG. 5 is a detailed view showing assembling and disassembling processes of corner keys of the blind. FIG. 6 is a view showing a connected state of a pull cord of the drum part of the blind. FIG. 7 is a view showing a connected state of the pull cord of the corner key of the blind. FIG. 8 is a view showing a state that the blind is moved twice. FIG. 9 is a view showing a state that the blind is moved three times. FIG. 10 is a view showing a state that the blind is moved five times. FIG. 11 is a view of another example of a space bar and a side guiderail according to the present invention.

[0035] In the drawings, there are a guiderail holder 1, a guiderail holder bottom 1-2, a back headrail half 2, a back headrail half fixing part 2-1, a back headrail half hole 2-2, a front headrail half 3, a front headrail half fixing part 3-1, a front headrail half hole 3-2, a front headrail side center cut 3-3, space bars 4, a side guiderail 5 or 5′, a side guiderail fixing part 5-1, a guide protrusion 5-2, webbing rollers 6, webbing roller supports 7, a helical gear 8, a helical gear through hole 8-1, a helical gear groove 8-2, a helical gear fixture 9, a shaft 10, an inner tilting mechanism 11, a helical gear inserting hole 11-1, magnet inserting grooves 11-2, 13-2, 16-2, 26-2 and 29-2, rollers 11-3, 13-3, 16-3, 26-3 and 29-3, a protrusion 11-4, a tilting mechanism cover 12, a front tilting mechanism 13, a tilting mechanism cover inserting hole 13-1, large corner keys 14 and 28, a large corner key space 14-1, large corner key holes 14-2, 14-3 and 14-4, small corner keys 14′, a number of pulley sets 15, an up-down hand 16, an up-down hand top 16-1, pull cords 17, an idle cord 17-1, a ladder string 18, alu slats 19, a bottomrail 20, a bottomrail end cap 21, a bottomrail weight rod 22, a ladder string bottom 23, an equalizing device 24, slat spacers 25, inner pull cord holders 26 and 29 with magnet, a rotary winder 26-1, an inner pull cord holder pulley 29-4, a cord fixing part 29-5 of the inner pull cord holder, an inner pull cord holder side supporter 29-6, a first distance shortening device 30, a first distance shortening device pulley 30-1, first distance shortening device connectors 30-2 and 30-3, second and third distance shortening devices 31 and 32, cord fixing parts 31-1, 31-2, 32-1, 32-2 and 32-6 of the second and third distance shortening devices, second and third distance shortening device tops 31-3 and 32-3, second and third distance shortening device bottoms 31-4 and 32-4, side fixing parts 31-5 and 32-5 of the second and third distance shortening devices, second and third distance shortening device covers 33 and 34, a space bar cover 40, side bottom extensions 42, a space bar inserting hole 43, a side guide extension 52, a webbing roller center hole 61, a webbing roller hole 62, a webbing roller ladder string fixing end 63, a webbing roller ladder string fixing body 64, a webbing roller flat top 65, a webbing roller ladder string fixing body supporter 66, webbing roller side protrusions 67, a webbing roller fixing hole 68, a webbing roller support center hole 71, a webbing roller support side cut 72, a webbing roller support bottom protrusion 73, a webbing roller support roller 74, webbing roller supporters 75, a frame A, an upper movable part B, drum parts C, a side movable part D, a slat part E and windows K.

[0036] As shown in FIG. 1, the blind includes the rectangular frame A, the windows K fit double on the front and rear surfaces of the frame A, the slat part E embedded between the double windows K fit on the front and rear surfaces of the frame A, the upper movable part B and the two drum parts C mounted between the back headrail half 2 and the front headrail half 3 of the upper frame A to control the slat part E, the side movable part D inserted and mounted in the side guiderail 5 of the side frame A, and the pull cords 17 connected to the slat part E having the bottomrail 20, the drum parts C, and the side movable part D having the large corner keys 14 for controlling opening and closing of the blind.

[0037] The structure of the blind will now be described in more detail as follows.

[0038] The windows K are adhered onto the front and rear surfaces of the rectangular frame A with adhesive or sealing agent.

[0039] As shown in FIG. 2, the rectangular frame A includes the guiderail holder 1 formed on the top thereof, the back headrail half 2, and the front headrail half 3 on the upper portion of the frame A. The back headrail half 2 is connected and fixed to the guiderail holder bottom 1-2, which is formed on the guiderail holder bottom, by the back headrail half fixing part 2-1 and the front headrail half fixing part 3-1 and has the back headrail half hole 2-2 and the front headrail half hole 3-2. The front headrail half 3 has the front headrail side center cut 3-3 formed in the central side of the front headrail half 3.

[0040] The frame A further includes the space bars 4 disposed on the left side and the bottom thereof, and the side guiderail 5 disposed on the right side of the frame A and located in the guiderail holder 1 formed on the top of the frame A and the guiderail holder 1′ formed on the outside of the side guiderail 5. The side guiderail 5 has an opened side and includes the side guiderail fixing parts 5-1 formed at both ends of the opened side and coupled with the guiderail holder bottom 1-2 and two guide protrusions 5-2 formed inside the side guiderail 5.

[0041] As shown in FIG. 5, the frame A further includes the large corner keys 14 and the small corner keys 14′. The large corner key 14 has the large corner key space 14-1 having the large corner key holes 14-2, 14-3 and 14-4 and the pulley sets 15 formed between the large corner key holes 14-2, 14-3 and 14-4 respectively. The small corner key 14′ does not have the corner key holes 14-2, 14-3 and 14-4 as in the large corner key 14.

[0042] As shown in FIG. 3, the upper movable part B includes the helical gear part embedded in a space formed between the back headrail half 2 and the front headrail half 3 formed on the upper portion of the frame A, the helical gear movable part located on the front headrail side center cut 3-3 and moving the helical gear part inserted therein, and the front tilting mechanism 13 mounted at a position corresponding with the helical gear part in a state that the window K is located, that is, at the outside of the window K contacted to the front headrail side center cut 3-3, to operate the helical gear movable part.

[0043] The helical gear part includes the helical gear 8 having the helical gear groove 8-2 formed in the surface thereof spirally, the semicircular helical gear hole 8- 1, and the shaft 10 inserted into the helical gear hole 8-1 of the helical gear 8.

[0044] The helical gear movable part is mounted on the front headrail side center cut 3-3 of the front headrail 3, and includes the helical gear inserting hole 11-1 formed in the lower portion for inserting the helical gear 8, the protrusion 11-4 formed vertically on the inner center of the helical gear inserting hole 11-1, and the inner tilting mechanism 11 mounted on the upper portion and having the magnet inserting groove 11-2 for inserting a magnet.

[0045] A front tilting mechanism part is located at the corresponding position of the helical gear movable part located across the window K, which is disposed on the outer top of the frame A, and includes the front tilting mechanism 13 projecting from the center of the frame A, the tilting mechanism cover 12 inserted into the lower portion of the front tilting mechanism 13, the tilting mechanism cover inserting hole 13-1 for inserting the tilting mechanism cover 12, and the magnet inserting groove 13-2 formed in the upper portion of the tilting mechanism cover inserting hole 13 -1 for inserting the magnet.

[0046] As shown in FIG. 3, the drum part C is mounted at the same position as the upper movable part B, and includes the webbing roller 6 inserted into the shaft 10 embedded into the space formed between the back headrail half 2 and the front headrail half 3, and the webbing roller support 7 located on the lower portion of the webbing roller 6, supporting the webbing roller 6 and fixed between the back headrail half hole 2-2 and the front headrail half hole 3-2 by the webbing roller support bottom protrusion 73.

[0047] The webbing roller 6 is in the form of a cylinder and located horizontally on the side center. The webbing roller 6 includes the webbing roller fixing hole 68 for inserting the shaft 10, the webbing roller center hole 61 concaved in the central portion thereof, the webbing roller hole 62 formed from the top to the central portion of the webbing roller, the webbing roller flat top 65 formed flat on the upper portion of the webbing roller 6, the webbing roller ladder string fixing body 64 of an arrow type projecting horizontally from the upper center of the webbing roller 6 to the webbing roller flat top 65 at a predetermined interval and fixing a ladder string, the webbing roller ladder string fixing end 63 of an arrowhead type located at the end of the webbing roller ladder string fixing body 64 for fixing the ladder string, and the webbing roller ladder string fixing body supporter 66 formed between a side of the upper portion of the webbing roller flat top 65 and the lower portion of the webbing roller ladder string fixing end 63.

[0048] The webbing roller support 7 includes the webbing roller supporters 75 projecting upwardly from right and left sides for inserting the webbing roller side protrusions 67, the webbing roller support side cuts 72 formed in the front and rear side surfaces for serving as a cord inserting hole, the webbing roller support center hole 71 formed in the center thereof, the webbing roller support roller 74 formed at a side of the upper portion of the webbing roller supporter center hole 71, and the webbing roller support bottom protrusion 73 projecting from the lower portion of the webbing roller support 7 for fixing the drum part C by being inserted into the back headrail half hole 2-2 and the front headrail half hole 3-2.

[0049] As shown in FIGS. 1 and 2, the side movable part D includes the inner pull cord holders 26 and 29 inserted and mounted into the side guiderail 5 of the frame A, the up-down hand 16 located at the outside of the window K closely contacted to the outside of the side guiderail 5, that is, at the corresponding position of the inner pull cord holders 26 and 29 located across the window K, and the first to third distance shortening devices 30, 31 and 32 connected with the inner pull cord holders 26 and 29 by the cord and mounted at a place inside the side guiderail 5.

[0050] As shown in FIG. 4, the first inner pull cord holder 26 includes the magnet inserting space 26-2 formed in the lower portion thereof for inserting the magnet, the roller 26-3 disposed on the surface of the magnet inserting space 26-2, and the rotary winder 26-1 inserted into a cylindrical part projecting from the upper portion thereof. The second inner pull cord holder 29 includes the magnet inserting space 29-2 formed in the lower portion thereof for inserting the magnet, the roller 29-3 disposed on the surface of the magnet inserting space 29-2, the inner pull cord holder pulley 29-4 formed at a side of the upper portion thereof, the inner pull cord holder side supporter 29-6 formed at the other side of the upper portion at a predetermined interval from the inner pull cord holder pulley 294, a through hole 29-7 formed in the upper portion of the inner pull cord roller 29-3, a through hole 29-9 formed in the center of the inner pull cord holder side supporter 29-6, a through hole 29-8 formed in the upper portion of the inner pull cord holder side supporter, and the inner pull cord holder cord fixing part 29-5 formed at an end of the inner pull cord holder pulley 29-4 for fixing the cord.

[0051] The up-down hand 16 includes the magnet inserting hole 16-2 formed in the lower portion thereof for inserting the magnet, the roller 16-3 disposed at both ends of the magnet inserting hole 16-2, and the up-down hand top 16-1 formed on the upper portion thereof.

[0052] The first distance shortening device 30 includes upper and lower plates, the first distance shortening device pulley 30-1 mounted between the upper and lower plates, and the first distance shortening device connectors 30-2 and 30-3 formed at both ends of the upper and lower plates.

[0053] The second distance shortening device 31 includes the second distance shortening device top 31-3 being in the form of a cylindrical bar, the cord fixing part 31-1 projecting from the upper portion of the second distance shortening device top 31-3 and having holes, which are formed in both sides and communicate with each other, for fixing the cord, the second distance shortening device bottom 31-4, the cord fixing part 31-2 having a hole, which is formed from the lower surface to a portion of a side of the second distance shortening device bottom 31-4 and perforates the inside of the cord fixing part to the other side thereof for fixing the cord, the side fixing part 31-5 formed on the side surface of the distance shortening device for preventing separation of the cord inserted into the cord fixing part 31-2 of the second distance shortening device, and the second distance shortening device cover 33 inserted into the second distance shortening device bottom 31-4 for fixing the fixed cord again.

[0054] The third distance shortening device 32 includes the third distance shortening device top 32-3 being in the form of a cylindrical bar, the cord fixing part 32-1 projecting from the upper portion of the third distance shortening device top 32-3 and having holes, which are formed in both sides and communicate with each other, for fixing the cord, the third distance shortening device bottom 32-4, the cord fixing parts 32-2, 32-6 and 32-7 having holes, which are formed from the lower surface in an upward direction of a side of the third distance shortening device bottom 32-4 and perforate the inside of the cord fixing parts to the inner center portion of the cord fixing parts for fixing knots of the cords, the side fixing part 32-5 formed on the side surface of the distance shortening device for preventing separation of the cord inserted into the cord fixing parts 32-2, 32-6 and 32-7, and the third distance shortening device cover 33 inserted into the third distance shortening device bottom 32-4 for fixing the fixed cord again.

[0055]FIG. 11 is another example of the space bar and the side guiderail according to the present invention. The frame A includes the space bar inserting holes 43 formed in the left side and the bottom thereof for inserting the space bars 4, and side bottom extensions 42 projecting from both edges of a side thereof for hiding the left side and bottom of the slat.

[0056] A side guiderail 5′, which is another example of the frame A, is in the same form as the side guiderail 5 and has side guiderail extensions 52 projecting from both edges of a side thereof for hiding the right side of the slat part.

[0057] The slat part E is in the same form as the existing blind, and so, its detailed description will be omitted.

[0058] An assembling process will be described as follows. As shown in FIG. 3, the upper movable part B and the drum parts C are assembled beforehand. After that, as shown in FIG. 6, the pull cord 17 is inserted into the webbing roller support center hole 71, and then, inserted into holes of the slats 19, which are assembled mechanically, and knotted. The slats 19 are connected to the drum part C with the ladder string in a common way. The webbing roller support bottom protrusion 73 of the drum part C is inserted into the back headrail half hole 2-2 and the front headrail half hole 3-2.

[0059] The rectangular frame A is assembled as follows. As shown in FIGS. 1 and 2, the back headrail half 2 and the front headrail half 3 are fastened to the guiderail holder bottom 1-2 of the guiderail holder 1 by the back headrail half top fixing part 2-1 of the back headrail half 2 and the front headrail half top fixing part 3-1 of the front headrail half 3.

[0060] After that, the side guiderail 5 is assembled to the other side of the frame A by assembling the side guiderail fixing part 5-1 to the guide rail holder bottom 1-2 of the guiderail holder 1 located on the outside. Before the assembly, the side movable part D is inserted into the side guiderail 5. The windows K are adhered on the front and rear of the rectangular frame A using the adhesive or sealing agent.

[0061] Corners of the upper and lower portions of the frame A are assembled with the large corner keys 14 and 28 and the small corner keys 14′, and after that, the windows K are adhered on the front and rear of the rectangular frame A using the adhesive or sealing agent.

[0062] In the above assembly, as shown in FIG. 3, the upper movable part B is assembled as follows. First, the helical gear 8 is inserted into the helical gear inserting hole 11-1 formed in the lower portion of the inner tilting mechanism 11, and then, a magnet is inserted into the magnet inserting hole 11-2 formed in the upper portion of the inner tilting mechanism 1 1. After that, the shaft 10 is inserted into the helical gear through hole 8-1 formed in the center of the helical gear 8, and then, the two drum parts C are mounted at both ends of the shaft 10.

[0063] The shaft 10 is inserted into the webbing roller fixing hole 68 formed in the side of the webbing roller 6, and then, the webbing roller side protrusions 67 of the webbing roller 6 are inserted and fixed into the webbing roller supporters 75 formed on the both sides of the webbing roller support 7. After that, the webbing roller support bottom protrusion 73 of the webbing roller support 7 is inserted into the back headrail half hole 2-2 and the front headrail half hole 3-2, so that the upper movable part B is mounted between the back headrail half 2 and the front headrail half 3 located on the upper portion of the frame A.

[0064] The front tilting mechanism 13 is located at the corresponding position of the inner tilting mechanism 11, which is mounted across the upper portion of the magnet and the window K mounted of the outside of the upper portion of the frame A. The tilting mechanism cover 12 is inserted into the tilting mechanism cover inserting hole 13-1 of the lower portion of the front tilting mechanism 13. A magnet is inserted into the magnet inserting groove 13-2 of the upper portion of the tilting mechanism cover inserting hole 13-1, so that the magnet inserted into the front tilting mechanism 13 has the opposite pole to the magnet inserted into the magnet inserting hole 11-2 of the upper portion of the inner tilting mechanism 11 located across the window K.

[0065] As shown in FIGS. 1, 2 and 4, the side movable part D is assembled as follows. The inner pull cord holder rollers 26-3 and 29-3 mounted on the lower portion of the inner pull cord holders 26 and 29 are fixed on the guide protrusion 5-2 of the side guiderail 5 of the frame A. After that, a magnet is inserted into the magnet inserting hole 26-2 formed in the lower portion of the inner pull cord holder 26, and then, another magnet, which is inserted into the magnet inserting hole 16-2 of the lower portion of the up-down hand 16, is located at the corresponding position of the magnet of the inner pull cord holder 26, which is located across the window K, so that the magnet of the inner pull cord holder and the magnet of the up-down hand have opposite poles to each other.

[0066] The first to third distance shortening devices 30, 31 and 32 of the side movable part D are located inside the side guiderail 5, and connected and fixed to the pulley sets 15 of the rotary winder 26-1, which is mounted on the upper portion of the inner pull cord holder 29, and the large corner keys 14 and 28 mounted on the upper and lower portions of the frame A by the cord. The side movable part D is movable vertically according to the movement of the cord.

[0067] The connection of the slats 19, the ladder string 18 and the pull cord 17 is the same as the conventional blind, but the present invention is different from the conventional blind in that the cord is connected to the improved components inserted into the frame A, i.e., the drum parts C and the side movable part D, after being inserted into the frame A.

[0068] The cords connected between the slats of FIGS. 1 and 2 and the bottomrail 20 formed under the lowermost slat 19 serves to open and close the blind, together with the ladder string 18, on which the slats 19 are fit one by one, for controlling a tilt angle of the slats 19. The connection of the pull cord 17 inserted into holes of the slats is the same as the conventional blind.

[0069] The side guiderail 5 has the idle cord 17-1 rotating idly after being fixed to the large corner keys 14 and 28 and the distance shortening devices 30, 31 and 32 inside the side guiderail 5. As shown in FIGS. 1 and 6, the slats 19 are fit on the ladder string 18 one by one as in the conventional blind, and the slat spacers 25 are located on the upper portion of each slat. The ladder string 18 passes the webbing roller support center hole 71 of the webbing roller support 7, and then, passes the webbing roller center hole 61 of the webbing roller 6 mounted on the upper portion of the webbing roller support 7. After that, a woven ring part of the ladder string 18 is inserted into the webbing roller ladder string fixing end 63 of the arrowhead type, and then, fixed to the webbing roller ladder string fixing body 64 connected to the webbing roller ladder string fixing end 63, so that the ladder string 18 can control the tilt angle of the slats while rotating the slats at a predetermined angle when being rotated by the rotation of the shaft 10 inserted into the webbing roller 6.

[0070] The two pull cords 17 are inserted into two holes formed in the slats 19 respectively, and then, fixed to the bottomrail 20 mounted under the last slat 19. As shown in FIG. 6, each of the pull cords 17 extending upwardly passes the webbing roller support center hole 71 and the webbing roller support roller 74 mounted above the webbing roller support center hole 71 of the webbing roller support 7. After that, as shown in FIG. 7, the pull cord 17 passes under the pulley set 15 mounted into the large corner key hole 14-2 of the large corner keys 14 and 28 formed at the corner parts of the upper and lower portions of the frame A. After that, the pull cord 17 passes the pulley set 15 inserted into the large corner key hole 14-3 formed above the large corner key hole 14-2, and then, connected to the inner pull cord holders 26 and 29.

[0071] As shown in FIG. 8, the two pull cords 17 connected to the inner pull cord holder 26 (at this time, the pull cords 17 open and close the slats 19 twice as much as the movement distance of the up-down hand 16) pass the rotary winder 26-1 located on the upper portion of the inner pull cord holder 26, and then, fixed and connected to the pulley sets 15 inserted into the large corner key hole 14-4 of the large corner keys 14 and 28.

[0072] As shown in FIG. 10, the two pull cords 17 connected to the inner pull cord holder 29 (at this time, the pull cords 17 open and close the slats 19 five times as much as the movement distance of the up-down hand 16) pass the inner pull cord holder pulley 29-4 mounted above the inner pull cord holder 29, and then, pass the first distance shortening device pulley 30-1 of the first distance shortening device 30. After that, the pull cords 17 pass the through hole 29-9, which is formed in the side supporter 29-6 of the inner pull cord holder 29, from the inside to the outside, pass the through hole 29-7 formed in the upper portion of the inner pull cord holder roller 29-3, and then, are connected and fixed to the cord fixing part 29-5 formed on the lower portion of the inner pull cord holder pulley 29-4.

[0073] As shown in FIG. 9, the two pull cords 17 connected to the inner pull cord holder 29 (at this time, the pull cords 17 open and close the slats 19 three times as much as the movement distance of the up-down hand 16) pass the inner pull cord holder pulley 29-4 mounted on the upper portion of the inner pull cord holder 29, and then connected and fixed to the cord fixing parts 31-2 and 32-2 of the distance shortening devices 31 and 32 mounted.

[0074] An end of the idle cord 17-1 is fixed to the distance shortening device connectors 30-2, 31-1 and 32-1 of the distance shortening devices 30, 31 and 32, passes the pulley set 15 inserted into the large corner key hole 14-4 of the large corner key 14 of the upper portion of the frame, passes the pulley set 15 of the large corner key hole of the large corner key hole 14-4 of the lower portion of the frame, and then, connected and fixed to the distance shortening device connectors 30-2, 30-3, 31-1, 31-2, 32-1, 32-2, 32-6 and 32-7 of the distance shortening devices 30, 31 and 32.

[0075] The blind is operated by three methods as follows.

[0076] The first method is to open and close the slats 19 twice as much as the movement distance of the up-down hand 16. When the up-down hand 16 is lowered, the two pull cords 17, which move downwardly after passing the slats 19, the two webbing roller supports 7, the webbing roller support roller 74, the pulley set 15 of the large corner key hole 14-2 of the large corner key 14 and the pulley set 15 of the large corner key hole 14-2, move upwardly after passing the rotary winder 26-1 of the inner pull cord holder 26, and are fixed to the pulley set 15 inserted into the large corner key hole 14-4 of the large corner key 14, are moved downwardly. At this time, the pull cord 17 moving downwardly from the inner pull cord holder 26 and the pull cord 17 moving upwardly through the rotary winder 26-1 are all moved downwardly, and thereby, the pull cords connected to the slats are moved upwardly and open the slats twice as much as the movement distance of the up-down hand 16. To close the slats, the components are operated to the contrary.

[0077] The second method is to open and close the slats 19 three times as much as the movement distance of the up-down hand 16. When the up-down hand 16 is lowered, the pull cords 17, which move downwardly after passing the slats 19, the two webbing roller supports 7, the webbing roller support roller 74, the pulley set 15 of the large corner key hole 14-2 of the large corner key 14 and the pulley set 15 of the large corner key hole 14-2, move upwardly after passing the inner pull cord holder pulley of the inner pull cord holder 29 and the pulley of the pulley fixing hole 29-4, and then are fixed to the cord fixing parts 31-2 and 32-2 of the distance shortening devices 31 and 32, are moved upwardly. At this time, the idle cord 17-1, which moves upwardly after passing the distance shortening device connectors 31-1, 31-2, 32-1, 32-7 and 32-6 of the distance shortening devices 31 and 32 and the pulley set 15 of the large corner key hole 14-4 of the large corner key 14, and the idle cord 17-1, which is fixed after passing the hole 29-8 of the inner pull cord holder side supporter, are connected with the idle cord 17-1, which moves downwardly to be connected to the pulley set 15 of the large corner key hole of the large corner key 14 located on the bottom of the frame, so that the idle cord 17-1 fixed to the distance shortening device connectors 30-3, 31-2 and 32-2 is idled upwardly.

[0078] The two pull cords 17, which move downwardly to the inner pull cord holder 29 from the pulley set 15 of the large corner key hole 14-2 of the large corner key 14 and the pulley set 15 of the large corner key hole 14-2, the pull cords 17, which are fixed to the cord fixing parts 31-2 and 32-2 of the distance shortening devices 31 and 32 after passing the inner pull cord holder pulley and the pulley fixing hole 29-4 of the inner pull cord holder 29 and moving upwardly, and the idle cord 17- 1, which is connected to the distance shortening devices 31 and 32, the large corner key 14, the inner pull cord holder side supporter hole 29-8 (cord fixing waist) and the large corner key 28 located at the bottom of the frame and idles vertically, are all moved up and down, and thereby, the cords connected to the slats are moved upwardly three times as much as the movement distance of the up-down hand 16 to open the slats. To close the slats, the components are operated to the contrary.

[0079] The third method is to open and close the slats 19 five times as much as the movement distance of the up-down hand 16. When the up-down hand 16 is lowered, the two pull cords 1, which move downwardly after passing the slats 19, the webbing roller supports 7, the webbing roller support roller 74, the pulley set 15 of the large corner key hole 14-2 of the large corner key 14 and the pulley set 15 of the large corner key hole 14-2, move upwardly after passing the inner pull cord holder pulley of the inner pull cord holder 29, the pulley of the pulley fixing hole 29-4 and the distance shortening device pulley 30-1 of the distance shortening device 30 separated at a predetermined interval from the pulley of the pulley fixing hole 29-4 and are connected to the cord fixing part 29-5 of the inner pull cord holder 29 after passing the hole 29-9 of the inner pull cord holder side supporter and the hole 29-7 located above the inner pull cord holder roller 29-3, are moved downwardly. At this time, the idle cord 17-1, which is knotted to the distance shortening device connector 30-2 of the distance shortening device 30, knotted again at the inner pull cord side supporter hole 29-8 after passing the pulley set 15 of the large corner key hole 14-4 of the large corner key 14 located on the top of the frame, and connected to the distance shortening device connector 30-3 after passing the pulley set 15 of the large corner key hole of the large corner key 14 located on the bottom of the frame, is moved downwardly.

[0080] The two pull cords 17, which move downwardly to the inner pull cord holder 29 from the pulley set 15 of the large corner key hole 14-2 of the large corner key 14 and the pulley set 15 of the large corner key hole 14-2, the two pull cords 17, which move upwardly to the distance shortening device pulley 30-1 of the distance shortening device 30 after passing the inner pull cord holder pulley and the pulley fixing hole 29-4 of the inner pull cord holder 29, the two pull cords 17, which pass the hole 29-9 of the inner pull cord holder side supporter of the inner pull cord holder 29 and the hole 29-7 located in the upper portion of the inner pull cord holder roller, and are fixed to the cord fixing part 29-5 of the inner pull cord holder 29 to be lowered, and the idle cord 17- 1, which moves upwardly after passing the pulley set 15 of the large corner key hole 14-4 of the large corner key 14 located on the upper portion of the frame, are all moved downwardly and fixed after passing the hole 29-8 of the inner pull cord holder supporter. Continuously, the idle cord 17-1 is connected to the distance shortening device connector 30-3 to rotate idly after passing the pulley set 15 of the large corner key hole of the large corner key 14 located on the bottom of the frame. The idle cord 17-1 moving vertically is moved downwardly together with the pull cords 17, and thereby, the cords connected to the slats are moved upwardly five times as much as the movement distance of the up-down hand to open the slats. To close the slats, the components are operated to the contrary.

[0081] As described above, the present invention has several effects as follows.

[0082] First, the present invention minimize friction coefficient when the pull cords are moved by roller are mounted on the webbing roller supports and the large corner keys to prevent loosening of the pull cords, and thereby, the bottom bar and the slats of the horizontal blind can be kept at a level when the up-down hand is operated vertically.

[0083] Second, the smooth movement of wheels located on the upper portion of the inner pull cord holder and the lower portion of the up-down hand can prevent a rise of the friction coefficient due to the strong magnetic force of the magnets, which are located on the upper portion of the inner pull cord holder and the lower portion of the up-down hand, required for maintaining weight of the horizontal blind.

[0084] Third, in the conventional blind, the inner pull cord holder just serves to lock the pull cords in such a manner that the knot of the pull cords are fixed by pressing the pull cords with a clip to maintain the leveled state without separation of the pull cords when the leveled state of the slats and the bottom bar of the blind are controlled, but the slats and the bottom bar cannot be controlled to the leveled state once being tilted due to loosening of the pull cords or other factors. However, in the present invention, a bar of a rotary disc located on the upper portion of the inner pull cord holder not only locks the pull cords but also rotates to pull the up-down hand downwardly helping the smooth rotation of the pull cords when the slats and the bottom bar of the blind are tilted, and thereby, the blind can automatically maintain the leveled state.

[0085] Fourth, differently from the conventional blinds having bolt tightening holes located in the side or rear surface, in the present invention, the bolt tightening holes of the webbing roller and the helical gear are located in the upper portion. Therefore, the prevent invention can improve convenience in work and productivity by directly performing the bolt tightening work after assembly of the shaft without rotating the webbing roller and the helical gear to ¼ and ½ revolutions.

[0086] Fifth, the webbing roller has a short end of the webbing roller ladder string fixing part of the webbing roller and the webbing roller center hole, so that the ladder string can easily reach the end of the webbing roller ladder string fixing part along the webbing roller center hole serving as a guider of the cord through the webbing roller support center hole. As the result, the ladder string can be easily inserted into the hole through the arrowhead of the short ladder string fixing end. Furthermore, the webbing roller ladder string fixing body supporter 66 located between the webbing roller ladder string fixing end 63 and the webbing roller ladder string fixing body 64 on the webbing roller flat top prevents the webbing roller ladder string fixing body 64 from being bent or cut downwardly by weight of the horizontal blind. Moreover, the webbing roller is directly tightened with a bolt through the hole located in the upper portion of the webbing roller without rotation. Therefore, the present invention can improve productivity and safety of the product.

[0087] Sixth, when the blind is moved vertically, the right and left portions of the slats and the bottom bar and the bottom of the bottom bar are inserted into an opened part of the frame of the form of a “

” Korean character, so that the frame not only serves as a guiderail of the slats and the bottom bar but also completely cover all gaps.

[0088] Seventh, in case of using the conventional blind, a user has to move the up-down hand as much as the vertical movement distance of the horizontal blind when opening and closing the blind. However, the prevent invention can provide the same effect as the conventional blind only by moving the up-down hand to ½, ⅓ or {fraction (1/5)} of the vertical movement distance of the horizontal blind using the pull cord holders 26 and 29, the large corner key 14 for shortening the distance to ½, the second and third distance shortening devices 31 and 32 for shortening distance to ⅔, and the first distance shortening device 30 for shortening distance to ⅘. As the result, the present invention can be utilized on windows mounted at lower parts or long windows, and thereby, the horizontal blind can be operated vertically to a desired position even though the up-down hand is moved short.

[0089] Eighth, the horizontal blind of the present invention is mounted between the double windows, and the outer frame is formed by the space bars having dehumidifying agent inside. So, the present invention can solve the problems of the conventional blind in which operating components are embedded, i.e., the exposure of the tilt rod for controlling the pull cords and its related components and rotational angle of the slats, inconvenience in use, frequent occurrence of stain and malfunction, and accumulation of dust on the slats and the ladder string. As the result, the present invention can extend life of the product, maintain cleanness of offices and houses, and maximize effects of interior design. Furthermore, the present invention can naturally conform to the Fire Services Act providing that no ornaments or screen are mounted in front of fireproof windows.

[0090] The forgoing embodiments are merely exemplary and are not to be construed as limiting the present invention. The present teachings can be readily applied to other types of apparatuses. The description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. 

What is claimed is:
 1. A blind of a sealed type formed inside double windows, the blind comprising: a rectangular frame; windows fit double on the front and rear surfaces of the frame; a slat part embedded in the double windows mounted on the front and rear surfaces of the frame; an upper movable part and drum parts mounted on a back headrail half and a front headrail half of the upper portion of the frame to control the slat part; a side movable part inserted into a side guiderail of a side of the frame; and pull cords connected to the slat part having a bottomrail, the drum parts, and the side movable part having the large corner keys for controlling opening and closing of the blind.
 2. The blind according to claim 1, wherein the windows are adhered on the front and rear surface of the rectangular frame using adhesive or sealing agent, and wherein the rectangular frame includes: a guiderail holder formed on the top of the frame and having the back headrail half and the front headrail half, the back headrail half being connected and fixed to a guiderail holder bottom, which is formed on the guiderail holder bottom, by a back headrail half fixing part and a front headrail half fixing part, the back headrail half having a back headrail half hole, the front headrail half having a front headrail half hole and a front headrail side center cut formed in the central side of the front headrail half; a space bars disposed on the left side and the bottom of the frame; a side guiderail disposed on the right side of the frame and located in the guiderail holder formed on the top of the frame, the side guiderail having a guiderail holder formed on the outside of the side guiderail, an opened side, a side guiderail fixing parts formed at both ends of the opened side and coupled with a guiderail holder bottom and two guide protrusions formed inside the side guiderail; and large corner keys and the small corner keys, the large corner key having a large corner key space having first to third large corner key holes and pulley sets mounted between the large corner key holes respectively, the small corner key not having the corner key holes as in the large corner key.
 3. The blind according to claim 1, wherein a space bar cover and a second side guiderail are located on the left side and the bottom of the frame, the frame comprises a space bar inserting hole for inserting the space bar and side bottom extensions extending from both ends of a side of the space bar to hide the left and bottom of the slat part, and the second side guiderail comprises protrusions extending from both ends of a side thereof in the same form as the first slide guiderail and side guiderail extensions for hiding the right of the slat part.
 4. The blind according to claim 1, wherein the upper movable part comprises: a helical gear part embedded in a space formed between the back headrail half and the front headrail half formed on the upper portion of the frame; a helical gear movable part located on a front headrail side center cut and moving the helical gear part inserted therein; and a front tilting mechanism mounted at a position corresponding with the helical gear part in a state that the window is located, that is, at the outside of the window contacted to the front headrail side center cut, to operate the helical gear movable part.
 5. The blind according to claim 4, wherein the helical gear part comprises: a helical gear having a helical gear groove formed in the surface thereof spirally; a semicircular helical gear hole, and a shaft inserted into the helical gear hole of the helical gear.
 6. The blind according to claim 4, wherein the helical gear movable part is mounted on the front headrail side center cut of the front headrail, and comprises: a helical gear inserting hole formed in the lower portion for inserting the helical gear; a protrusion formed vertically on the inner center of the helical gear inserting hole; and an inner tilting mechanism mounted on the upper portion and having a magnet inserting groove for inserting a magnet.
 7. The blind according to claim 4, wherein the front tilting mechanism part is located at the corresponding position of the helical gear movable part located across the window, which is disposed on the outer top of the frame, and comprises: the front tilting mechanism projecting from the center of the frame; a tilting mechanism cover inserted into the lower portion of the front tilting mechanism; a tilting mechanism cover inserting hole for inserting the tilting mechanism cover; and a magnet inserting groove formed in the upper portion of the tilting mechanism cover inserting hole for inserting a magnet.
 8. The blind according to claim 1, wherein the drum part is mounted at the same position as the upper movable part, and comprises: a webbing roller inserted into the shaft embedded into the space formed between the back headrail half and the front headrail half; and a webbing roller support located on the lower portion of the webbing roller, the webbing roller support supporting the webbing roller and being fixed between the back headrail half hole and the front headrail half hole by the webbing roller support bottom protrusion.
 9. The blind according to claim 8, wherein the webbing roller is in the form of a cylinder and located horizontally on the side center, and comprises: a webbing roller fixing hole for inserting the shaft; a webbing roller center hole concaved in the central portion thereof; a webbing roller hole formed from the top to the central portion of the webbing roller; a webbing roller flat top formed flat on the upper portion of the webbing roller; a webbing roller ladder string fixing body of an arrow type projecting horizontally from the upper center of the webbing roller to the webbing roller flat top at a predetermined interval, the webbing roller ladder string fixing body fixing a ladder string; a webbing roller ladder string fixing end of an arrowhead type located at the end of the webbing roller ladder string fixing body for fixing the ladder string; and a webbing roller ladder string fixing body supporter formed between a side of the upper portion of the webbing roller flat top and the lower portion of the webbing roller ladder string fixing end.
 10. The blind according to claim 8, wherein the webbing roller support comprises: a webbing roller supporters projecting upwardly from right and left sides for inserting the webbing roller side protrusions; webbing roller support side cuts formed in the front and rear side surfaces for serving as a cord inserting hole; a webbing roller support center hole formed in the center thereof; a webbing roller support roller formed at a side of the upper portion of the webbing roller supporter center hole; and a webbing roller support bottom protrusion projecting from the lower portion of the webbing roller support for fixing the drum part by being inserted into the back headrail half hole and the front headrail half hole.
 11. The blind according to claim 1, wherein the side movable part comprises: inner pull cord holders inserted and mounted into the side guiderail of the frame; an up-down hand located at the outside of the window closely contacted to the outside of the side guiderail, that is, at the corresponding position of the inner pull cord holders located across the window; and first to third distance shortening devices connected with the inner pull cord holders by the cords and mounted at a place inside the side guiderail, and wherein the up-down hand comprises a magnet inserting hole formed in the lower portion thereof for inserting the magnet, a roller disposed at both ends of the magnet inserting hole, and an up-down hand top formed on the upper portion thereof.
 12. The blind according to claim 11, wherein the first inner pull cord holder comprises a magnet inserting space formed in the lower portion thereof for inserting the magnet, a roller disposed on the surface of the magnet inserting space, and a rotary winder inserted into a cylindrical part projecting from the upper portion thereof.
 13. The blind according to claim 11, wherein the second inner pull cord holder comprises a magnet inserting space formed in the lower portion thereof for inserting the magnet, a roller disposed on the surface of the magnet inserting space, an inner pull cord holder pulley formed at a side of the upper portion thereof, an inner pull cord holder side supporter formed at the other side of the upper portion at a predetermined interval from the inner pull cord holder pulley, a through hole formed in the upper portion of the inner pull cord roller, a through hole formed in the center of the inner pull cord holder side supporter, a through hole formed in the upper portion of the inner pull cord holder side supporter, and an inner pull cord holder cord fixing part formed at an end of the inner pull cord holder pulley for fixing the cord.
 14. The blind according to claim 11, wherein the first distance shortening device comprises upper and lower plates, a first distance shortening device pulley mounted between the upper and lower plates, and distance shortening device connectors formed at both ends of the upper and lower plates.
 15. The blind according to claim 1, wherein the second distance shortening device comprises a second distance shortening device top being in the form of a cylindrical bar, a cord fixing part projecting from the upper portion of the second distance shortening device top and having holes, which are formed in both sides and communicate with each other, for fixing the cord, a second distance shortening device bottom, a cord fixing part having a hole, which is formed from the lower surface to a portion of a side of the second distance shortening device bottom and perforates the inside of the cord fixing part to the other side thereof for fixing the cord, a side fixing part formed on the side surface of the distance shortening device for preventing separation of the cord inserted into the cord fixing part of the second distance shortening device, and a second distance shortening device cover inserted into the second distance shortening device bottom for fixing the fixed cord again.
 16. The blind according to claim 11, wherein the third distance shortening device comprises a third distance shortening device top being in the form of a cylindrical bar, a cord fixing part projecting from the upper portion of the third distance shortening device top and having holes, which are formed in both sides and communicate with each other, for fixing the cord, a third distance shortening device bottom, cord fixing parts having holes, which are formed from the lower surface in an upward direction of a side of the third distance shortening device bottom and perforate the inside of the cord fixing parts to the inner center portion of the cord fixing parts for fixing knots of the cords, a side fixing part formed on the side surface of the distance shortening device for preventing separation of the cord inserted into the cord fixing parts, and a third distance shortening device cover inserted into the third distance shortening device bottom for fixing the fixed cord again.
 17. A method for operating a blind, which is mounted inside double windows, to open and close slats twice as much as the movement distance of an up-down hand, wherein when the up-down hand is lowered, two pull cords, which move downwardly after passing the slats, two webbing roller supports, a webbing roller support roller, a pulley set of a large corner key hole of a first large corner key, move upwardly after passing a rotary winder of an inner pull cord holder, and are fixed to a pulley set inserted into a third large corner key hole of the large corner key, are moved downwardly, at this time, the pull cord moving downwardly from an inner pull cord holder and the pull cord moving upwardly through a rotary winder are all moved downwardly, and thereby, the pull cords connected to the slats are moved upwardly to open the slats twice as much as the movement distance of the up-down hand, and the components are operated to the contrary to close the slats.
 18. A method for operating a blind, which is mounted inside double windows, to open and close slats three times as much as the movement distance of an up-down hand, wherein after being knotted at the bottom of a bottomrail, pull cords, which move downwardly after passing the slats, two webbing roller supports, a webbing roller support roller, a pulley set of a first large corner key hole of a large corner key and a pulley set of a large corner key hole, move upwardly after passing an inner pull cord holder pulley of an inner pull cord holder and a pulley of a pulley fixing hole, and then are fixed to cord fixing parts of second and third distance shortening devices, are moved upwardly, at this time, an idle cord, which moves upwardly after passing distance shortening device connectors of the distance shortening devices and a pulley set of a third large corner key hole of the large corner key, and an idle cord, which is fixed after passing the hole of an inner pull cord holder side supporter, are connected with an idle cord, which moves downwardly to be connected to a pulley set of a large corner key hole of a large corner key located on the, bottom of a frame, so that the idle cord fixed to the distance shortening device connectors is idled upwardly, and wherein the two pull cords, which move downwardly to the inner pull cord holder from the pulley set of the large corner key hole of the large corner key and the pulley set of the large corner key hole, the pull cords, which are fixed to the cord fixing parts of the distance shortening devices after passing the inner pull cord holder pulley and the pulley fixing hole of the inner pull cord holder and moving upwardly, and the idle cord, which is connected to the distance shortening devices, the large corner key, an inner pull cord holder side supporter hole (cord fixing waist) and the large corner key located at the bottom of the frame and idles vertically, are all moved up and down, and thereby, the cords connected to the slats are moved upwardly three times as much as the movement distance of the up-down hand to open the slats, and the components are operated to the contrary to close the slats.
 19. A method for operating a blind, which is mounted inside double windows, to open and close slats five times as much as the movement distance of an up-down hand, wherein after being knotted at the bottom of a bottomrail, two pull cords, which move downwardly after passing the slats, webbing roller supports, a webbing roller support roller, a pulley set of a large corner key hole of a large corner key and a pulley set of a large corner key hole, move upwardly after passing an inner pull cord holder pulley of an inner pull cord holder, a pulley of a pulley fixing hole and a distance shortening device pulley of a first distance shortening device separated at a predetermined interval from the pulley of the pulley fixing hole and are connected to a cord fixing part of the inner pull cord holder after passing a hole of an inner pull cord holder side supporter and a hole located above an inner pull cord holder roller, are moved downwardly, at this time, an idle cord, which is knotted to a distance shortening device connector of the distance shortening device, knotted again at an inner pull cord side supporter hole after passing a pulley set of a third large corner key hole of the large corner key located on the top of a frame, and connected to the distance shortening device connector after passing a pulley set of a large corner key hole of a large corner key located on the bottom of the frame, is moved downwardly, and wherein the two pull cords, which move downwardly to the inner pull cord holder from the pulley set of the large corner key hole of the large corner key and the pulley set of the large corner key hole, the two pull cords, which move upwardly to the distance shortening device pulley of the distance shortening device after passing the inner pull cord holder pulley and the pulley fixing hole of the inner pull cord holder, the two pull cords, which pass the hole of the inner pull cord holder side supporter of the inner pull cord holder and the hole located in the upper portion of the inner pull cord holder roller and are fixed to the cord fixing part of the inner pull cord holder to be lowered, and the idle cord, which moves upwardly after passing the pulley set of the large corner key hole of the large corner key located on the upper portion of the frame, are all moved downwardly and fixed after passing the hole of the inner pull cord holder supporter, and continuously, the idle cord is connected to the distance shortening device connector to rotate idly after passing the pulley set of the large corner key hole of the large corner key located on the bottom of the frame and the idle cord moving vertically is moved downwardly together with the pull cords, and thereby, the cords connected to the slats are moved upwardly five times as much as the movement distance of the up-down hand to open the slats, and the components are operated to the contrary to close the slats.
 20. The blind according to claim 2, wherein a space bar cover and a second side guiderail are located on the left side and the bottom of the frame, the frame comprises a space bar inserting hole for inserting the spaced—bar and side bottom extensions extending from both ends of a side of the space bar to hide the left and bottom of the slat part, and the second side guiderail comprises protrusions extending from both ends of a side thereof in the same form as the first slide guiderail and side guiderail extensions for hiding the right of the slat part. 